Door shock absorber



Oct. 10, 1950 v. A. KREsHEcK nooR sHocK ABsoRBER 2 Sheets-Sheet 2 Filed June 30, 1948 A'ITD RN EYS Patented Oct. 10, 1950 Es PATENT oFFilCEf- Doon SHOCK ABSORBER vladimirAnton Kresheck, Two Rivers, Wis.

Application June 30, 1948, Serial No. 36,152

f2 Claims. (Cl. lli-86) This invention relates to a shock absorber,

and more particularly to a shock absorber `for use on doors.

An object of the invention is to provide a door in the event the door is caught by gusts of wind and blown open violently. 1

Another object of the invention is to provide a shock absorber which will positively limit the opening movement of a door to a predetermined range of movement suiiciently small to avoid injury to the door. 1

A further object of the invention is to provide a shock absorber for offering a progressively increasing resistance to the nal movement of a door in its opening direction.

A further object of the invention is to provid a shock absorber for a door which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are employed to designate like-parts throughout the same:

Figure l is a side elevational view of the shock absorber attached to a door with the door in closed position according to the present invention;

Figure 2 is a sectional View taken on the line 2-2 of Figure 1; Y

Figure 3 is a sectional view on an enlarged scale taken on the line 3--3 of Figure 1, with the door in open position;

Figure 4 is a fragmentary view on a still greater scale of the shock absorber attached to a door, with the door in open position, according to the present invention;

Figure 5 is a sectional view taken on the line 5 5 of Figure 4. f

. 2 having spaced parallel side walls A and 2I and extending between side walls 29 and 2I and secured thereto is a pair of end walls 22 and 23. The end walls 22 and 23 are each provided with aligned apertures 24 and 25, respectively, for slidably receiving the rod 26 therein.

One end of the rod 26 is threaded, as at 2l, and extends through an apertured U-shaped clip 28 having depending legs 29 and 30. The rodr2'6 is releasably locked to the clip 28 by means of the castle nuts 3I and 32 which are threaded on the end 2l of the rod 26. The clip 28 is so arranged that its legs 29 and 30 are between the apertured flanges 33 and 34 of the bracket 35, Figures l and 4. Extending through the apertured flanges 33, 34, and the legs 29 Y and 39 is a stud bolt 33, thereby providing a Referring to the drawings, the numeral I0.

designates an outside storm or screen door, the door IIl being hingedly connectedto a door jamb or frame I I by means of an outside hinge I2.

The shock absorber I3 is provided for limiting opening movement of the door I0 relative to the door jamb II, andthe shock absorber I3 comprises a bracket I4 secured to the top of the door jamb II by means of the screws I5. Carried by the bracket I4 is a stud bolt I6. An arm Il' has one end connected to the bolt I6, thereby providing a pivotal connection between the arm Il' and bracket I 4. Secured to the other end of the arm I 1 by means of bolts I8 is al casing I9 Positioned on the other end of the rod 26 is a bumper assembly 31. The bumper assembly 3l embodies a series of rubber bumper rings 38 provided with a longitudinally extending bore 39 for the reception therein of the rod 25. Arranged in spaced parallel relation between the bumper rings is a plurality of transversely disposed steel washers 40 for insuring a progressively increasing resistance to opening of the door I0 -as subsequently described. The end of the rod 26 is threaded at'4I and a nut 42 is in threaded engagement with the threaded end III of the rod 26 for maintaining the bumper assembly 3'! on the rod 26. f

The operation of the device is started when the door I0 is moved away from the door frame I I as by a sudden gust of wind. The opening of the door causes the arm I 'I to pivot about the stud bolt I 6 with the casing I9 being slidably moved along the rod 26 until the end wall 22 of the casing I9 strikes or abuts the inner bumper ring 38 to compress the latter and thus positively limit the opening of the door, since the bumper assembly 31 is mounted on one end of the rod 26, with the other end of the rod 26 being pivotally connected to the door IIJ.

In Figures 3 and 4, the rubber bumper rings 38 are shown in their compressed position, such position resulting when the door I9 is suddenly opened, and as a result of the rubber bumper rings 38 being provided with a plurality of spaced steel washers 40 therebetween, a progressively increasing resistance will be offered to the nal movement of the door, thereby preventing damage to the latter.

From the foregoing description rand a study of the drawings, it will be apparent that I have provided a new construction. It is, of course, to be understood that I reserve the right to make such changes in the form, construction, and arrangement of parts as will not depart from the spirit of the invention or the scope of the appended claims.

I claim:

1. In a shock absorber for a door hingedly secured to a door frame, a first bracket secured to said door frame, an arm having one end pivotally connected to said bracket, a casing carried by the other end of said arm, a rod slidably carried by said casing, a second bracket secured to said door and pivotally connected to one end of said rod, and a bumper assembly on the other end of said rod for abutting said casing when said door is moved away from said frame, said bumper assembly comprising a rubber bumper provided with a longitudinally extending .bore for receiving said rod, a plurality of spaced parallel transversely disposed washers circumposed on said rod, and means for maintaining said bumper on said rod.

2. In a shock absorber for a door hingedly securedlto a door frame, a rst bracket secured to said door frame, an arm having one end pivotally connected to said bracket, a casing carried by the other end of said arm, a rod slidably carried by said casing, 'a second bracket secured to said door and pivotally connected to one end of REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATESY PATENTS Number Name Date 1,858,541 Duffy May 17, 1932 2,219,824 Schonitzer Oct. 29, 1949 

